Maurice Victor Macmillan, Viscount Macmillan of Ovenden,, was a British Conservative Party politician and Member of Parliament. He was the only son of Harold Macmillan, 1st Earl of Stockton, who was Prime Minister of the United Kingdom from 1957 to 1963.

Lady Dorothy Evelyn Macmillan was an English socialite and the third daughter of Victor Cavendish, 9th Duke of Devonshire, and Evelyn Cavendish, Duchess of Devonshire. She was married to Harold Macmillan from 1920 until her death.